Apparatus for making paper bags.



No. 875,526. PATENTED DEG.31, 190'?. O. HESSER.

APPARATUS POR MAKING PAPER BAGS.

P I0 10N FILED M .1 A PL AT AY" 90 14 sHBETssHEET 1.

No. 875,526. PATENTED IDEC. 31, 1907. 0. HESSER.

APPARATUS POR MAKING PAPER BAGS. APPLIOATION FILED MAY 9,1905.'

14 SHEETS-SHEET 2.

No. 875,526. PATENTED DEC.31, 1907.

0. HESSER.

APPARATUSFOR MAKING PAPER BAGS.

APFLIUATION FILED MAY 9,1905.

14`SHEETS-SHEET 3,

M f WL W1 www@ A -Y/f/m X/MZQM 7m 7 I N0. 8'75,526. PATENTED DEC. 31, 1907.

0. HESSER.

APPARATUS POR MAKING PAPER BAGS. APPLICATION FILED MAY 9.1905.

14 SHEETS-SHEET 4. l

MFP-f W l @Whe/M64 No. 875,526. l

0. BESSER.

APPARATUS FOR MAKING PAPER BAGS.

APPLIGATION FILED MAY 9.1905.

ff ZU PATENTED DEG. 31, 1907.

14 SHEETS-SHEET 5.

No. 875,526. PATENIED DEG. 3l, 1907.

0. HESSER.

APPARATUS EUR MAKING PAPER BAGS.

APPLICATION FILED MAY 9.1905.

14 SHEETS-SHEET 6.

No. 875,526. l EATENTED DEC.v 31, 1907.

o. HEssER.

APPARATUS FOR MAKING PAPER BAGS.

, PPLIo TIoN EILEEM Y 9 5. A A 9 l 0 v14'slums-SEEE'u: 7,

No. 875,526. PATENTED DECJSL 1907',4

0. HESSER.

APPARATUS FOR MAKING PAPER BAGS.

PPLIo TIoN FILED M Y ,1 A A A 9 900 14SHBETSSHEET s.

No. 875,526. PATENTED DEC. 31, 1907.

0. BESSER.

APPARATUS FOR MAKING PAPER BAGS. APPLICATION FILED MAY 9.1905.

14 SHEETS-SHEET 9.

No. 875,526. PATENTED DEG. 31, 1907. o. BESSER.

APPARATUS POR MAKING PAPER PAGS.

APPLICATION FILED MAY 9,1905.

14SHEETS-SHEET l1` No. 875,526. PATENTED DEG.31, 1907. 0. HESSER.

APPARATUS POR MAKING PAPER BAGS.

APPLIOATION FILED MAY 9.190-.

n 14 sHEETs-sHEET 12.

No. 875,526. PATENTED DEG. 31, 1907. O. EESSER.

APPARATUS POR MAKING PAPER BAGS.

PPLI N F 1 A OATIO ILED MAY!) 90o 14 SHEETS-SHEET 13 lpg@ PATENTED DEC. 31, 1907.

O. BESSER.

APPARATUS FOR MAKING PAPER BAGS.

APPLICATION FILED MAY 9,1905.

14 SHEETS--SHEET 14.

OTTO HESSER, OF CANN'STATT, GERMANY.

APPARATUS FOR MAKING PAPER BAGS.

Specification of Letters' Patent.

Patented Dec. 31, 1907.

Application filed May 9, 1905. Serial No. 259.535.'

To all whom it may concern:

. Be it known that I, OTTO HEs'sER, a citizen of the German Empire, residing at Cannstatt, Kingdom of iVrtemberg'Empire of Germany, have invented certain new and `usefullmprovements in Apparatus for Making Paper Bags; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a machine for makin@ lined and single paper bags with crosswise folded hexagon bottom, so-called cross bottom, of s uare and oblonoP form. The sheets employe in making lined paper bags are by their treatment on one side caused to adhere one to the other in the ordinary way, and then these two combined sides lie in the finished paper bag at the opening of the same in order that in filling no material can come between the vtwo papers.

Instead of double sheets of course single sheets might equally well be employed, which, however, are preferably not inserted by hand but automatically conveyed to the machine by means of any of the known automatically working devices.

In the accompanying drawings, Figure l is a central vertical section of the feeding end of the machine, showing principally the mechanism for feeding the sheets to the slotted folding table; Fig. 2 is a plan view of the same; Fig. 3 is a detail section, on a'n enlarged scale; of a number of the feeding rolls shown in Fig. l; and illustrating also the dellecting roller and the folding table; Fig. 4 is a transverse sectional view through the primary table, and the paper-feeding carriage; Fig. 5 is a detail view of the mechanism for operating the carriage; Fig. 6 is a side elevation of the parts shown in Fig. 1 Fig. 7 is a detail sectional view'of the same on the line 7 7 of Fi 6' Fiff. 8 is an end view show-4 g D I ing principally themechanism for operating the folding plate stops, the 'folders and presser; Fig. 9 is a detail View, on an enarged scale, of one of the folding plates and the tube indent-ing finger; Fig. 1() is an end view of the same, showing the finger-carrying shaft in section; Fig. 11 is a detail, on a still larger scale, showing the manner in which the paper tube is interlocked with the folding plate; Fig. 12 is a side elevation of the frame guides between which the successive folder plates pass; and showing also the pressing and folding means at this point; Fig 13 is a transverse sectional View of the same on the line 13-13 of Fig. 12; Fig. 14 is` a sectional plan View of the mechanism shown in Fig. 12; Fig. 15 is a detail view of the operating mechanism of thefolder plate sto s; Figs. 16, 17' and 18 illustrate, in detai, successive stages of the folding of the odge of the paper around a folder late; Fig. 19 is a central vertical section of t at end of the machine opposite the portion shown in.

Fig. 1; Fig. 20 is a planview of the same; Fig. 21 is an end elevation of the same; Fig. 22 is a detail plan view of the tube-notching or cutting mechanism; Fig. 23 is a transverse section of the machine, principally on the plane indicated by the line 2.3.*23 of Fig. 58; Fig. 24 is a plan view of the mechanism shown in Fig. 23; Fig. 25 is an enlarged detail view of portions of the folding mechanism shown in Fig. 23; Fig. 26 is a vertical sectional view of the same; Fig. 27 is a detail sectional plan view on the line 27*27, of Fig. 23; Fig. 28 is a vertical section of the same on the line 2S-28, of Fig. 27; Fig. 29 shows one of the folding members in side and front elevation; Fig. 29a is a sectional view of the folding member shown in Figs. 28 and 29. Figs. 30 to 30c illustrate in detail, successive stages of the opening of the end of the tube; Fig.'31 is an elevation of the bottom folder; Fig. 32 is a side view of the same7 partly in section Fig. 33 is a plan view of the bottom folder; Fig. 34 is' a front View of the tube holder; Fig. 35 shows one of the folders in detail; Fig. 36 is a detail sectional view, on an enlarged scale, showing the formation of the sharp edge in the bottom fold; Fig. 37 is a transverse sectional View of the machine approximately on the line 37-37 of Fig. 58; ig. 38 is a plan view, partly in section, showing the folder-actuating eccentric Orcam; Fig. 39 is a detail view of the driving connections of the levers- 175; Fig. 40 is a detail elevation, looking from the left of Fig. 37; Fig. 4l is a detail lan view of the folders and their carrying evers; Figs. 42 and 43 illustrate the operation of the bottom folders; Fig. 44 is a lan view, showing the operation of these fofders; Fig. 45 is a detail perspective view of the bag after the bottom has been folded; Fig. 46 shows the bottom pressing stamp, and its actuating means; Fig. 47 is a plan view of the same; Fig. 48 is a "the folder 4plate and conveying the same to plates and their actuating means; Fig. 50 is a' f of the mec anism on an enlarge transverse section of thelmachine a .roXi-v mately on the line 48-48 of Fig. 58; 1g. 49

isa sectional elevation, showing the sinking side viewof the same, 51 is a plan view of the relation to the uides; ig. 52 is a detail sectional view of t el mechanism for turning the bottom of the finished bagyFig. 53 shows the mechanism for removing the bags from partly in section; Fig.

the trough; Fig. 54 shows, in elevation and side view, the bag turning or folding mem-v ber at the entrance of the trough; Fig. 55 is a sectional elevation of the trough; Fig. 56 is a transverse sectional view of the same; Fig.-

57 is a plan view of the same; Fig. 58 is a lan view of the entire machine; Fig. 59 is a side elevation of the machine. Fig. 6() is an end view of the apparatus' for applying the paste in making a tube, parts'being shown in section. Fi 61 is an end yview of a ortion scale. Figs. 61a, 62El and 6,3 to 68, are diagrams illustrating the different steps of manufac-v ture.

The frame 2 of a device which feeds a sheet of paper 6 to the vconveyer mechanism 19, is arranged on the machine frame 1. 1t carries a table 3 in which a aper carriage 4 travels (Figs. 1, 2 and 4), w'ich is moved by a double 'cam a mounted on the front driving shaft 72. For this object projections 7 are provided on the under side of the carriage 4 and to'these projections a link 8 attached, which is moved by a lever4 9 (Fig. 1). This lever is mounted on a rock shaft 10 having bearings 11 in the frame 2.

The transmission of the movement of the cam or eccentric a to the shaft 1'0'is effected b means of rod 14 mounted in the guide 15 of7 the bearing 11, which rod is connected b a link 13 with a lever 12 m'ounted on the sha t 10. On the movement of the shaft, the paper carriage 4 is reciprocated and catches 5 provided thereon convey, in the forward movement, the double sheet 6 of paper laid hand from the starting point on the ta- The forward movement of the paper carriage 4 is calculated in such a way that after its completion, the sheet 6 comes with its front end, that is to say with the two edges which are stuck together, between two superimposed conveying rollers 16 and 17 which serve for moving it forward. For this object a number of similar pairs of rollers 16 and 17 are arran ed, the under ones 16 of which are revoluby mounted in the frame 2 and constantly rotate, while the upper ones 17 are elastically mounted in the bearings 18 and 18a, and lift on the passa e of the sheet of paper 6. The conveying ro 1ers 16 are operated from the driving gear of the machine by a belt pulley 250 mounted on a transverse lates, showingtheirI shaft 73, by means of a belt pulley 252 mounted in a frame' 251, on the shaft of which latter belt pulley, a chain wheel y253 is arran ed, which in .turnopera'tes by means yof a c ain 21 a chain wheel 21 mounted on the shaft of thefinal conveyin roller 16a.

By means of the intermes 'n toothed wheels 22, chain vwheels 23, andy t eir .chain 23 and also the toothed wheels24, the various conveyer rollers 16 are operated so that the sheet 6 asses from one pair of rollers 16,

17 to the ot er, intermediate plates `26 being v provided which conduct the sheet 6 from one roller. to another. 1n order to uide the sheet''on the inclined folding p ate 27, a roller 25 (Fig. 3) is provided which is driven from the conveying roller 16a by means of the toothed wheel 26. The roller 25 is pro- 'vided with a rough surface, for instance emery aper, and so arranged that the front end of t e arriving sheet 6 is deflected downwards and thus reaches the inclined folding plate 27, that is to sa comes to a third stage of treatment. The p ate 27 han s loosely on the shaft of the conveying rol er 16a, .and rests on a set screw 28a arranged in the arms 28 of the frame 2 the screw serving also as a means for adjusting the angular position of the plate.

In order to form0 the sheet which has.

reached the folding table 27, it is conveyed `further by a conveyer mechanism 19 from sta e to stage. The conveyingmechanism in t e present machine consists of an endless chain on the links of which folding plates or folders 29 are arranged and( which is moved forward periodically by means of a ratchet mechanism, the paper sheet 6 being' carried along by these folders 29 and remainin' thereon until completely converted into a ished paperbag. The conveying mechanism 19 and also its ratchet mechanism are both wellknown and therefore need not be further eX- plained. A slot 27 a isv provided in the folding table 27 for the passage of the folder plate 29 (Fig. 2). The sheet 6 lying on the folding table 27, on the folder passin the slot, lis drawn through this slot 27*l and t vereby folded longitudinally (Fig. 63). The folder plate 29 in question then passes between two guide frames 31 which are rovided with suitable recesses for the parts to 15) and its sheet 6 lies on two stops 32, so that the position of all the folder plates 29 at this station is exactly the same and the gum is always applied on the correct spot. These two stops 32 are carried on a rock shaft 33 mounted in the rear guide frame 31, which shaft by means of a toothed wheel 34 and a sector 35 revoluble on the pin 36 with an,arm 37, and also an eccentric rod 38, is soturned by thecam b (Fig. 58) that the sto s 32 assume their stopping position short y before the movement 1s ended, a spring 39 drawing them out of the way of the folder plate 29 imere Working (Figs. 12

mediately before the latter is moved forward (Figs. 8 and l8). Simultaneously with the stops 32, a pin 71, mounted on the same shaft 33, is turned against the approaching folder plate 29 and now impresses a dent in the paper 6, the paper being pressed into a recess 70, provided in the plate, which thus revents the paper tube slipping off the fo der plate 29 when .the latter is/ directed downwards.

As soon as the folder plate 29 rests with its longitudinally folded sheet 6 on the stops 32, they are both pressed by a plate 41, mounted on the revoluble shaft 42, against the wall of the rear ide frame 31, the turning of the shaft 42 eing accomplished by means of a lever 43 mounted thereon, which is connected by a link 44 with an elbow lever 45 mounted on the bolt 46, which lever is operated by means of a cam rod 47 from a cam c and stands under the action of a spring 48 (Fig. 8). Before the folder plate is again moved forward,

Ithe plate 41 is turned somewhat back and the tube 6 released.

The folding over (Fig. 65) of the part of the sheet 6 which stands up above the folder plate 29 is effected by a folder 59,.which is mounted on an arm 60 mounted on the shaft 61. The folder 59 executes a double movement in order to fold over the sheet 6, first a turning on the shaft 61 and then a horizontal movement. The turning is effected by means of a lever 67 acted on by a spring 69,

which lever is mounted on a shaft 61 and moved by means of an eccentric rod 68 from an eccentric or cam e. In the horizontal movement of the folder 59 a carriage 62 carrying the shaft 61 travels on a fixed guide bar 63 mounted on the rear guide frame 31 and the bearing 63a, and is moved by a link 64 and elbow lever 65 pivoting on the shaft 57 by means of an eccentric rod 66 from an eccentric e. All these devices are well known in themselves, but an improvement is the arrangement of a slide 49 (Figs. 12414) which prevents the bending up of the upper edfge of the part, which is to be overlapped, o the sheet 6. The slide 49 lies in the plane of the pressing on plate 41 and is 'fastened with a projection 49a to a vertical carriage 50 which travels in guides 53 on'the plate 41 and is pushed upwards by a lever 54 loosely mounted on the shaft 33 (Figs. 12 to 14).l This lever is an elbow lever and is moved by a link 55, and also an elbow lever 56 pivotally mounted on the shaft 57 by means of an eccentric rod 58 from an eccentric or cam d.

` The slide 49, shortly before the commencepushed u ment 'of the movement of the folder 59, is

and there ycovers the upper edge of the tube 6, so that it cannot be bent back when being overlap ed. Shortly-before the completion of the olding, the slide 49 is drawn back again by means of a spring 51, so that the folding down may take p and correctly, whereby the paper tube is 6.11-l

to the level of the folder plate 29 place unimpededly ished.

Before the folding down, gum is applied' to the uppermost edge of the sheet 6 (Fig. 64). This may be done in any suitable way, for instance, 4in a similar manner to that hereinafter explained at station VI, and the mechanism employed is preferably of the character shown in Figs. 60, 61 and 62, in which the pasting stamp 256 is carried by an arm 257 which is mounted on which is vthe shaft 2.58, I pivotally mounted in the carriage 259. The carriage travels on a guide bar v 260. which is fixed4 on the standards 31 mounted on the machine table 1. The carriage is moved to and fro by means of a link 263 and lever 263 which receives its motion from an shaft 72.

The turningl of the shaft 258 when the pasting stamp moves forward and backward is accomplished by means of a grooved plate 264, in which a groove 265 of approximately parallelogrammatic form is cut. In this groove 265 fits a pin 266 which is carried by a crank 267 mounted on the shaft 258, so that the stamp 256 and stamp carrying arm 257 and crank 267 form to a certain extent a two-armed lever the axis of rotation 258 of which'is moved horizontally, and which itself is caused to turn by means of the pin 266 traveling in the groove 265. The groovei265 consists of horizontal parts 265a and 265b and also of inclined parts 265C and 2651, of which the latter operate to rock the stamp 256.

eccentric 263a on the driving So long as the pin 266 travels in the upperv horizontal part .265a of the groove, the stamp 256 moves forwards uniformly with the carriage 259 without altering its horizontal position. During this movement the elastic stamp 256 takes up aste, preferably from a paste roller 268 revo ving in the paste containing vessel 269, over which roller the stamp 256 rubs. ther movement of the carriage 256comes into the inclined art 265c of the groove 265 and enters on a ownward movement, during which the axis of rotation 258 of the stamp always moves forward uniformly and horizontally.

By the time the pin 266 has reached the lower horizontal part 265b of the groove 265, the stamp 256 has rotated through 90, so that it stands horizontally, 'In this osition the paste is ap lied to the sheet o paper 6 standing on t e folding plate 29.

Preferably when the stamp 256 is pressed on the sheet of paper the shaft 258,'which serves as a support or counter holder for the stamp, is at the same height as the stamp 256.

N ow in order to prevent the pin 266, in its then succeeding return movement, from The pin 266, on the furtongue stamp 256 rentering 'the portion 265c of the groove, a

tongue 270 is providedlin the part 26.5C of the groove, which tongue forms the inner wall of the part 256c of the groove, and which tongue is mounted on a pin 271 which is pivotally mounted in the guide bearing 264. A lever 27 3 which is under the action ofja spring 274 is mounted onI the pin 271 and presses the bent tongue 270 against the opposite cheek of the part 265c of the groove. The flap'273EL of the tongue 270 1s ressed aside on the passage of the pin 266 through the part 265c of the groove. The 270 returns however immediately afterwards into its former position in which it closes the` branch 265c of the groove, so that on thereturn of the stamp the pin 266 is Jforced to return to the horizontal' part 265b of the groove. The stamp 256 thus remains in a horizontal position until it has passed the paste roller 268, after which the pin 266 enters a .groove 265d which is rst oblique and then runs vertically, by means of which groove the stamp 256 again reaches its initial vertical position.

For various sizes of bags the place at which the paste is a plied to the sheet varies, although only s 4ghtly, and the pasting must accordingly be adjustable in its height when applying the paste. For this purpose the lower Wall 275 of the part 265b of the groove, together with the point ci the groove at which the pin 266 is located when the paste is applied, is displaceable. This is attained by the wall 275 being formed as a double armed lever. 1t is pivotal on a bolt 276, while its Jfree end 277 lies between set screws 278 which are arranged in eyelets of the frame 272. The front endI of the grooved plate 264 may thus be further moved upwards or downwards by adjusting the screws 278.

On the next forward movement of the conveyer chain 19, the tube 6 comes to next station (Figs. 19 to 22). Here. a narrow piece is punched out (Fig. 63) of the outer end of the paper tube 6, as it is well-known is necessary in making paper bags with with square bottoms. For this object, the tube 6 passes between a knife or punch 79 and its die 79a (Fig. 22), so that when the punch 79 is projected, a suitable piece is punched out of the tube 6. The punch 79 is carried in projection 78 of a vertically movable carriage 76 and its projecting end slides on a bar 89.. ln order to move the punch 79, a vertical slot is provided in this end, in which slot a pin 87 engages, by the help of which the movement takes place. The in 87 is mounted on one arm of an elbowI ever 88 which turns on the pivot 90 of a bearing 91. The other arm of the lever is connected with an veccentric rod 92 which is operated from a double cam f mounted on the rear driving shaft 40.

As in a machine according to the resent invention, paper bags of various widt s may be made, for which of course folder plates29 of varying width are necessary, the carriage' i 76 carrying the punch 79 is vertically ad- 70 justable so that thecutting operation may always be at the middle of the Width of the' paper tube. For this object the vertical car riage 76 movable in theguides 77 of a horizontal carriage number of perforations 98" (Fig. 19), 'in which, according to requirements, an adjustl ing pin 99 is inserted which holds the'-"ca r'' riage at the desired height (Fig. 19). The' entire punching apparatus may also be easily '80 changed, in the case of extra large sized paper bags, by drawing out the carriage 76. At this station the tube 6 is also drawnout to the extent necessary for forming the bottom. This is done by its being clamped on the die 79a, and the latter then drawn back with .the horizontal carriage 75. This retention. of the tube is accomplished b means of al slide 81,-which also sliding in t e projections 78, effects the retention by a foot 85, which is i pressed by a spring 83 against the die 79a, on the punch 79 being sufiiciently moved Jforward.` On the return of the punch 79, a

rojection 80 thereon engages behind a pro'- jection 84 of the carriage 81 and draws this 95 latter back (Fig. 22), so that the paper tube 6 is released, whereby it may be Jfurther conveyed to the next station. The drawing back of the horizontal carria e 7 5, together with the depending vertica carriage 76, 100 punch 79 and tube 6, which horizontal carriage slides in the bearings 74, is effected by means of a spring 96 one end of which is attached to the carriage 75 and the other to the fixed yoke 7 4a of the bearing 7 4, This spring 105 is stretched when the carriage 75 is pushed in, which is done by means of an elbow 'lever 93 pivotally mounted on the pin 94 oi the carriage bearing 74, and a rod 95 operated by a cam g. This movement may be regulated by a stop 97 fixed on the carriage 75, which stop a set screw 98 on the bearing'74 encounters, while the drawing back of the carriage 7 5, that isto say the extent to which the tube is withdrawn from the folding blade may be suitablyadjustedby means of removable stops 100 which the carriage 75 in its return movement encounters, in other words the actual .bottom of the paper bag 6, may be suitably restricted. On being moved forwarfhthe paper tube6 now passes upwards in a vertical position and at the next station it passes into a folder late guide 101 (Figs. 23 and 24). Immediiately after reaching this station, it is pressed by Va slide 128 against a iixed part of the guide 101 and thereby retained during the movement, until it is conveyed further (Figs. 25 and 34). This movement is obtained by means of a lever 129, the head of which lies in asuitable 130 75 has at various heights a 75 slot of the slide 128 and mounted on a shaft 130 which is revoluble in a bearing arranged on the frame 111. The shaft 13() itself' is o erated, from an eccentric i mounted on tilfe shaft 72, by means of an eccentric rod 132 and a lever 131 mounted on the shaft 130 ottoni takes place by means of a sharp fold.

For this object the tube 6 is first opened, which is done by the gumming stamps 102 which, in order to apply the gum encounter the tube 6'from both sides simultaneously,

' and in returning, draw the same apart. The

gumming stamps 102 stand initially in a ver! tical position and must. therefore be turned through 90, that is to say into a horizontal position, in order to apply the gum (Figs. 23 and 25). This turning of the two 'gumming stamps 102 and also their ushing forward takes place simultaneous so that they reach the tube 6 from both sides exactly at the same time and therefore form a mutual support in applying the gum.

The turning of-both the gumming stamps 102 and their projection is attained by similar devices which are in themselves known and therefore only the former of them will be briefly hereinafter described (Figs. 23-26).

The front gumming stamp 102 1s mounted on a holder 103 which is in turn firmly connected with a shaft 104 revolubly mounted in the carriage 105. In order to turn the stamp 102 out of the vertical position into a horizontal one, after it has been provided with gum by means of Aa gumming roller 107 of a gumming apparatus 108 mounted on the frame 111, a lever 1 17 is mounted on the shaft 104, which lever has a pin 118 which travels in a groove 119 of a switch 112 also arranged on the frame 1 1 1. In order to allow this pin 118 a movement in one direction only, a revolu'ble tongue 113 is provided which is pushed aside by the pin 118 on the movement forward of the stamp 102, and after passing the same is again returned to its normal position by a spi-ing 116, so that the return way in thi.` branch groove 119 is immediately closed again, and the in 118 is forced to slide intothe horizontal ranch of the groove 119.

Links 121 and 125 ush forward or project the carriages 105 of t etwo stamps 102, the carriage 105 sliding on the fixed guide rails 120. The link 125 is directly mounted on an elbow lever 126, while the link 121 is first connected with a two-armed lever 122 pivotally mounted on,a'fiXed pin 123 (Figs.

l .23 and .28), said lever 122 being in turn a ain connected by the link 124 with the el ow lever 126. This is pivoted on the pin 127 I on a frame 110, which carries the rear gumming apparatus 108, and is moved by a cam l disk 71- which is mounted on the rear drivin l shaft 40. The transmission is so selected j that both stamps 102 are uniformly pushed forward and uniformly encounter the paper'- ltube 6 on both sides.` These Uummmg they serve for applying the gum, and then to open the paper tube 6. 'Ihe first operation is etfected'by the device hereinbefore explained, while the latter is automatically effected on the return of the stampf102,the tube walls remaininfr adherent thereon b reason of the gum (Iigs. 30 to 30), so that the tube 6. They serve for separating the bottom part of thetube 6according to the contour of the bottom, so that the edges in this position may be sharply folded.

In order to insert the preliminary folders 133 in the paper tube 6, they are suspended by means of levers 134 on a verticalacarriage ,136 which travels in a second vertical carriage 137, which is removable to allow of paper bags of various sizes being made, this second vertical carriage is arranged in uides 138 of the frame 139 firmly connecte with the slide bars 120. The carriage 137 has, beneath, a semicircular guide 135 for the preliminary folders 133, so that, by the carriage 136, the carriage 137 is also held in a raised position., The up and down movement o latter, is effected by means of the lever 141 which is connected with a double armed lever 142 pivotally mounted on the pin 143 of a bearing 144 arranged on a frame 145 and operated by means of an eccentric rod 146 from an eccentric c. Now if the carriage 136 be lowered, the preliminary folders 133 enter the paper tube 6 previously opened by the retreating gumming stamps 102 (Fig. 30a The two carriages 136 and 137 sink together until the contact screw 140 mounted on the latter carriage, rests on the frame 139, so that also the semicircular guide 135 is stopped. The carriage 13 6, however, descends still further and accordingly the preliminary folders 133, following the same, must separate in consequence of the stoppage of the guide 135, and this takes place at the moment at ywhich the preliminary folders 133 have penetrated into the paper tube 6 to the projections 147 (Fig. 30h). The bottom part of the tube 6 is thereby stretched so far apart that together with the folders 133 it rests on the projections 147.

The folding ofthe edges is now effected by means of two-edge folders 148 (Figs. 31-33) which are cut out to suit the form of the bottom and the working edges of which are beveled (Fig.'35). These folders 148 make a double movement, first they descend and then they move laterally toward each other.

the former, and therefore also of the i stamps 102 have a double function; first sov now the preliminary folders 133 'can enter bottom (Figs.

In order to allow of the sinking of the folders 148, they are mounted on levers 149 which are revolubly mounted on a shaft 150 revoluble in tlie frame 145 and the bosses of which levers have teeth 157 beneath, with which two mutually engaging toothed wheels 158- ear. One of these 1s turned by means of a ever 159 mounted on its shaft, which lever is moved by meansof an eccentric m, mounted on the shaft 72, by the intermediary of an eccentric rod 160 guided in the frame 145. vIn this lateral movement, a'revolu'ble roller 153 mounted on each lever 149, by means of its bearin s 154, slides on their tracks v151 and 152 w 'ch are mounted on the shaft 150. By means of these tracks 151' and 152, the sinkin and rising ofthe edge folders is effected, as tigre shaft 150 is moved from the eccentric l, b means of the track 152 shaped as a double ever and an eccentric rod 155, whereby the tracks 151, and 152, sink and rise, the ed `e folders 148 in the first case being drawn own by springs 156.` v

The sharplyfolded e ges (Fig. 64) are folder 148 pushing its beveled edge over the bottom part of the paper bag 6 (Fig.36) which has been opened and rests on the projections 147, within which part of the paper tube the preliminary folders 133 are located which are also beveled in order to produce a sharp edge at the folding place (Fig. 29a). The paper tube 6 now passes to the next station where the and 65) is formed. For plate 162 (Figs.

formed by the edge this object a wedge shaped 37 and 38) enters the opened bottom part on the cross supports 171.

. mon to both (Figs. 37, 39, 40

transversely to the plane of the tube 6, in order to prevent any movement of the bottom duringthe work of the bottom folders, and completely opens the same.

The wedge 162 is mounted on a carriage 163 which travels in guides 164 of a vertical carriage 165 and is moved up and down by means of an eccentric n, mounted on the rear driving shaft 40 through the intermediary of an eccentric rod 17 3'and two levers 172 and 168 mounted on the shaft 169, the shaft being revolubly mounted in-bearings mounted The further formation of the bottom is accomplished by two pairs of flat folders 174 and 182 (Figs. 42 to 44) working against one another. The two folders 174 move in similar manner to the two edge folders 148. They are mounted on levers 175 and their rollers 177 rest on a track 178 revoluble on an aXis 150 and comand 41), which track is moved by means of an eccentric rod 179 by an eccentric o mounted on the shaft 72, so that the aid of the springs. effected by means of toothed Wheels 180, gearing with one another, the eccentric p of the shaft 72 by means of an eccentric rod 181, which toothed Wheels gear which levers inturn are made capable of on pins 192 held in bearings 193.

folders 174 descend by thev The lateral movement is and revoluble from` with the toothed bosses of the levers 175. The lappimr over of bottom ls-eected by meansof the folders 182 which first lie in recesses beneaththe bottom in the guides 101, and then are elevated by the rise of the vertical carriage 165 sliding on guide bars 166 `and successively-lap over the middle part of the bottom. The lifting of the carriage `165 is effected by means of links 187 which are connected with double armed levers 188 pivoted on the cross bar 167, moved by means of the eccentric rod 189, which is forked above, from an eccentric 1 mounted on the shaft 40. The lapping over of the middle 'part of the' bottom is effected by the folders 182 approaching one another in consequence of the turning of the eccentric 183, this turning being produced by means of a bevelwheel 184 and segment or sector 184 the shaft of which is mounted in ver 185 which is moved by an eccentric g, mounted on the shaft 40, by the intermediary on an eccentric rod 186 guided in the-cross bar 167 and a lever 186? At the next station, the bottom is pressed down by the pressing stamp 189 (Figs. 46 and 47), which moved by means of an eccentric s mounted on shaft 72. 1n consequence of the further movement of the conveyer chain 19, the folder late 29 located towar s the side and thereby the end of the bottom sinks beneathv the guide bars 101. Now in order to avoid damage to the bottom, the respective part ofthe guide bars 101 is and 51).

For this purpose two plates 191 are inserted there, said plates being pivoted The sinking of the plates 191'is effected byan eccentric tmounted on the cross shaft 73, which eccentric moves by means of an eccentric rod 202 a double armed lever 200 acted on by a spring 303. This lever is pivotally mounted on the pin 201 of the bearing 74 and connected by a rod 199 with a link 194, which is connected with a lever 195 mounted on the shaft 196. The shaft 196 is revolubly mounted on the bearings 197 and 198 and carries on vits front end a second lever 195a corresponding with the lever 195, which lever 195a is connected with a link 194a wherebyl 'both plates 191 are uniformly lowered.

On its way to the next station, the bottom of the finished paper ba 6 is turned through 90, that is to say folded over in the plane of the tube (Fig. 66). This is accomplished by a stationary cam 204 provided on one part of the guide bar 101, on'to which. cam one side of the bottom runs (Fig. 52) and is thereby folded over. The complete folding over and fiat pressing of the same is completed by an elbow piece 205 Whi 'hl 's mounted on the shaft 206. This is mounted in a bearing 209'which is mounted on a lever 190 being loweredI (Figs. 49,

the middle part of the the cross bar 167, a lel on this spot inclines 

